[profile-stdlib][patch] Stdlib advisory tool implemetation

[Paolo Carlini]

Hi,

please, do not top-post, thanks.
> For now, I just want to make sure I understand the part with the 
> release schedule.  You mention convincing maintainers about putting it 
> in 4.4.0, but we are developing on a branch [profile-stdlib] and do 
> not plan to merge into trunk until the next stage 1.  I think we are 
> only about 30% done with implementation and keep coming up with new 
> ideas faster than we can code them.  Our targeted merge point is 
> sometime early next year.  Does this schedule make sense?
No problem with me, I knew nothing about your exact schedules. I was 
under the impression you wanted to merge something, as a start... Well, 
my basic points stand ;)

Good work!
Paolo.